Lucid Dreaming - A useful skill?

My lucid dreams are more like a competition between my conscious and subconscious. For example, I will realize it is a dream and I will do something to try to save myself, but then my dream develops something else to bring about trouble. My latest one involved trying to walk along a railing and trying not to fall off. I would try to keep myself on the railing, but it seemed like it was oiled or something because I continued to slip even though I knew it was a dream and that I could try to keep myself from slipping (even though I wouldn't really hurt myself ff I fell).

Jam it back in, in the dark.